Abstract
A ternary Al-8Si-5.1Cu (in wt.%) alloy was rapidly quenched from the melt at cooling rates between 106 and 107 K/s using the melt-spinning technique. The resulting ribbons were characterized using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness techniques. On the basis of the Al peak shifts measured in the XRD scans, a solid solubility extension value of 3.83 at.% Si in Al was determined. Whereas SEM investigations showed the presence of dendrites rich in Al, TEM investigations revealed nanosized spherically shaped Si crystals 20-25 nm in size. Both XRD and TEM investigations confirmed the absence of any intermetallic phase formation. The microhardness value of the melt-spun alloy was measured as 201 kg/mm2.
| Original language | English |
|---|---|
| Pages (from-to) | 3296-3301 |
| Number of pages | 6 |
| Journal | Materials Letters |
| Volume | 57 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - Jul 2003 |
Funding
The authors wish to thank Ms. Nurten Dinçer for her help and contributions during the SEM investigations of this study. The initial phase of this investigation was funded by the State Planning Organization (DPT) under the project title “Development of Al alloys by Osprey Process” and this is gratefully acknowledged.
| Funders | Funder number |
|---|---|
| DPT | |
| Devlet Planlama Örgütü |
Keywords
- Alloys
- Characterisation methods
- Melt-spinning
- Metals
- Microstructure
- Solidification
- Ternary Al-Si-Cu alloy